Merge pull request #231 from mwfogleman/regex

Regex navigator.

CHANGES.md

@@ -1,3 +1,7 @@
+## 1.0.5-SNAPSHOT
+
+* Add `regex-nav` navigator for regexes, which navigate to every match in a string and support replacement with a new substring.
+
 ## 1.0.4
 
 * Add `indexed-vals` navigator, a variant of `INDEXED-VALS` that allows for a customized start index.

src/clj/com/rpl/specter.cljc

@@ -1068,6 +1068,13 @@
       (swap! structure next-fn)
       structure)))
 
+(defnav regex-nav [re]
+  (select* [this structure next-fn]
+           (doseqres NONE [s (re-seq re structure)]
+                     (next-fn s)))
+  (transform* [this structure next-fn]
+              (clojure.string/replace structure re next-fn)))
+
 (defdynamicnav selected?
   "Filters the current value based on whether a path finds anything.
   e.g. (selected? :vals ALL even?) keeps the current element only if an

src/clj/com/rpl/specter/navs.cljc

@@ -478,6 +478,7 @@
       structure
       (updater structure next-fn))))
 
+
 (defn- update-first-list [l afn]
   (let [newf (afn (first l))
         restl (rest l)]

test/com/rpl/specter/core_test.cljc

@@ -1434,6 +1434,20 @@
   (is (= "abq" (setval s/LAST "q" "abc")))
   )
 
+(deftest regex-navigation-test
+  (is (= (select (s/regex-nav #"t") "test") ["t" "t"]))
+  (is (= (select [:a (s/regex-nav #"t")] {:a "test"}) ["t" "t"]))
+  (is (= (transform (s/regex-nav #"t") clojure.string/capitalize "test") "TesT"))
+  (is (= (transform [:a (s/regex-nav #"t")] clojure.string/capitalize {:a "test"}) {:a "TesT"}))
+  (is (= (transform (s/regex-nav #"\s+\w") clojure.string/triml "Hello      World!") "HelloWorld!"))
+  (is (= (setval (s/regex-nav #"t") "z" "test") "zesz"))
+  (is (= (setval [:a (s/regex-nav #"t")] "z" {:a "test"}) {:a "zesz"}))
+  (is (= (transform (s/regex-nav #"aa*") (fn [s] (-> s count str)) "aadt") "2dt"))
+  (is (= (transform (s/regex-nav #"[Aa]+") (fn [s] (apply str (take (count s) (repeat "@")))) "Amsterdam Aardvarks") "@msterd@m @@rdv@rks"))
+  (is (= (select [(s/regex-nav #"(\S+):\ (\d+)") (s/nthpath 2)] "Mary: 1st George: 2nd Arthur: 3rd") ["1" "2" "3"]))
+  (is (= (transform (s/subselect (s/regex-nav #"\d\w+")) reverse "Mary: 1st George: 2nd Arthur: 3rd") "Mary: 3rd George: 2nd Arthur: 1st"))
+  )
+
 (deftest single-value-none-navigators-test
   (is (predand= vector? [1 2 3] (setval s/AFTER-ELEM 3 [1 2])))
   (is (predand= list? '(1 2 3) (setval s/AFTER-ELEM 3 '(1 2))))